High Back Chairs OK in sunshade area?

This is probably a dumb question, but are “regular” high back chairs OK to use in the sunshade/behind walking path?

I can’t recall if it’s low back required everywhere…I know FAQs says lowback only in front of the soundboard area, just can’t remember how far back the soundboard is since it’s been a few years. Assuming lowbacks only for tarp area up front, all kinds of chairs OK behind the walking path. Thanks!

Yeah - high back is fine back there, as it’s far beyond the “low back only” line.